Saw-guard



G. A. ANDERSON.

SAW GUARD.

APPLICATION FILED 001.24.19z9.

1,381,612, Patented June 14,1921.

' ATTORNEY PATENT OFFICE.

GEORGE A. ANDERSON, F ENSLEY, ALABAMA.

SAW-GUARD.

Specification of Letters Patent.

Patented June 14, 1921.

Application led October 24, 1919. Serial No. 333,844.

T 0 all wiz-0m t may conce/Mt.'

Be it known that I, GEORGE A. ANDERSON, a citizen 'of the United Statesof America, residing at Ensley, in the county of Jefferson and State ofAlabama, have invented certain new and useful Improvements inSaw-Guards, of which the following is a specification.

My invention relates to a guard for rip saws.

Heretofore guards for rip saws have been mounted in various ways so asto give and permit the board or timber' to pass under them to the saw,but all of the saw-guard mountings which I have seen have been of suchcharacter as to bind and present some difficulty to the workmen inintroducing the forward end of the timber under the guard.

The chief object of my invention is to provide a free working orfloating attachment for the guard which is of such character as to avoidany binding or strain on its standard and which is particularly adaptedto cause no additional work or annoyance to the operator.

A further object of my invention is to attach the guard to a standard bylinks of such length that the guard will adjust itself readily for usewith all sizes of rip saws without requiring any adjustment.

A further object is to so design the parts so that they may be attachedand detached from the saw table with the least possible trouble and inthis connection I preferably form the standard and its base as integralmembers which are attached by bolts passing upwardly through the table.

A further Object is to design the standard which supports the swinginglinks of the guard so as to enable the guard to be closed overhead closeup to the standard so as to avoid upwardly flying splinters. To this endthe standard is made dceply'concave on its forward edge.

My invention also comprises the novel details of construction andarrangements of parts, which in their preferred embodiment only areillustrated 1n the accompanying drawings, in which Figure l is a sideView of my invention showing the guard in one operating position.

Fig. 2 is a partial plan and 4partial sectional view taken on the line2--2 of Fig. l.

Fig. 3 is a side elevation showing the guard in dilferent operatingpositions.

Similar reference numerals refer to similar parts throughout thedrawings.

I have shown my invention as a guard for a rip saw l mounted in thecustomary manner so as to work through a slot in the table 2. A standard3 is formed narrow enough to be inserted through the saw slot in thetable and it has an integral base et adapted to be connected to theunderface of the table by countersunk screws 5 and wing nuts (5. The topof the standard is provided with a hole to receive a pivot bolt 7forming a bearing from which a pair of links 8 are hung, one link beingdisposed on each side of the standard and each mounted on an overhungend of the bolt T.

The bolt is held in position by a wing nut 9 which is readily removablefor the easy attachment of the bolt and links S, thereby permitting thestandard to be removed downwardly through the table by removing nuts 6.The free ends of these links are connected by pivot pins 10 torearwardly extending arms ll of the saw-guard l2. These arms ll. asshown in Fig. 2, pass freely on opposite sides of the standard and aredisposed at an upward and rearward inclination from the rear end of theguard proper. The guard is formed of an arcuate hollow casting havingits side walls 13 provided with elongated slots to lighten it and havingtheir bottom edges struck on a curve substantially conforming to topcurve. The sides 13 are integral with the rear arms ll, being ,drawninwardly after leaving the guard proper so as to give the arms thedesired closer spacing'. The guard has a top 14 which terminates nearits rear end and which extends to the tip of the forwardly and upwardlyinclined guide extension 15. This extension is closed on its undcrfaceand has mounted in the hollow interior thereof a plurality ofantifriction rollers 1G. the peripheries of which project slightlythrough slots in the underface of the extension and form antifrictionguides to facilitate the passage of the timber under the guard. Thearcuate main body of the guard is left open underneath and is of`sufficient depth and length to safely shield the operator from thelaterally flying splinters during the sawing operation.

It will be observed from Fig. 1 that the rear end of the top 14 standsjuxtaposed to the forward edge of the standard and it will also be seenthat the standard has its forward edge above the lower position of theguard cut away on a deep concave at 17 which is projected so as topermit the guard to follow freely the rearward swing of the links 8without binding against the standard. This is important, as the top 14of the guard must extend far enough rearwardly to prevent the escape ofupwardly and rearwardly flying splinters and at the same time it mustnot engage or bind against the standard as that would lnterfere with thefree mounting or floating suspension of the guard.

In operation, having attached the standard to the table and the guard tothe standard in the manner described, the guard will drop freely to thetable and present its inclined forward extension with the exposedrollers to be engaged by the oncoming board. As the board strikes theguard it vyields freely rearwardly toward the standard and in doing soit both lifts itself and l is tilted, causing its inclined face to slantmore and more sharply toward the on coming board and thus permit thelatter, particularly after it engages the rollers, to ride freely andeasily under the guard without it being necessary for the operator totouch or ease the guard during the operation. During the sawingoperation, the guard slides freely on top of the timber with its topheld close to the standard and it is therefore adapted to prevent theupward escape of splinters while the sides of the guard prevent thelateral escape of splinters. The most dangerous time is at thecompletion of the sawing operation and it will be observed that the ardis so mounted as to drop freely behmd the rear end of the timber themoment the latter passes it and is thus in position to catch anyrearward flyin splinters and to prevent a back kick of t e timber. Assoon as the timber passes the guard the latter drops freely to the sawframe bed and rests there until the next operation, it

, being observed that the length of the links is such as to adapt theguard without adjustment of its part or of the standard supporting it tobe used with all sizes of rip saws and to take care of the maximum rangeof timber sections to be sawed. The deep concave in the forward edge ofthe standard enables me to use a guard closed overhead almost up to thestandard as it hangs normally which can follow the rearward swing of itssupporting links under pressure from the timber without engaging thestandard.

This invention is not intended to be restricted in scope to the specificembodiments shown, but contemplates such modifications as come withinthe spirit and scope of the claims. f

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is Y,

1. In combination, a standard mounted to project above the saw table inline with the saw, a swinging link pivoted to the top of the standard,and a freely floating sawguard having a rearwardly projecting armpivotally connected only at its rear end to the free end of said link,said guard being closed in overhead and said standard having its frontedge cut away to permit the rear end ofthe guard to follow freely therearward swing of its supporting link without binding against thestandard, substantially as described.

2. In combination, a standard mounted to project above the saw table inline with the saw, swinging links pivoted to opposite sides of the topof the standard, and a freely oating saw-guard having its rear endbifurcated to straddle the standard and pivotally connect to the freeend of said links, said standard having its forward edge cut away toclear the rear end of the guard as it swings rearwardly and upwardly inservice.

3. In combination, a standard mounted to project above the saw table inline with the saw, a freely floating saw-guard disposed in front of thestandard and having a rearwardly and upwardly extending arm, and anupwardly and forwardly projecting link pivotally connecting the rear endof said arm to the top of-the standard, the forward edge of saidstandard being'cut away to permit the rear end of the guard to followfreely the rearward and upward swing of its supporting link withoutbinding against the standard.

4. In combination, a standard ada ted to be mounted on a saw table inline wit a saw and having an overhanging forward top portion, a pair oflinks pivotally connected to said overhanging top portion, a freelyfloating saw-guard. having rearwardly and upwardly extending armsadapted to straddle the standard, and means to pivot the rear ends ofsaid arms to said links, said arms being designed when the guard is atrest on the saw table to support the links at a rearward inclination.

5. In combination, a standard adapted to be mounted on a saw table inline with a saw and having an overhanging forward top portion, a pair oflinks pivotally connected to said overhanging top portion, a freelyfloating saw-guard having rearwardly and upwardly extending arms adaptedto straddle the standard, and means to pivot the rear ends of said armsto said links, saidarms being designed when the guard is at rest on thesaw table to support the links at a rearward inclination ofapproximately 45.

6. The combination of a standard, means to attach said standard to thesaw table, said standard having its forward edge cut away on a deepconcave arc, a pair of links, a readily detachable pivot for connectingsaid links to the top of the standard on each side thereof, a ioatingsaw-guard curved in side elevation and having rear- Wardly extendingarms adapted to straddle i and project substantially to the rear of theforward edge of the standard, and means to pivotally connect the rearends of said arms to the links with the latter disposed at a rearwardinclination, substantially as described.

In testimony whereof I aix my signature. i

GEORGE AANDERSON. W'itness:

NoMIE WEnsH.

